From Lua 5.2: Extended results from os.execute() and pipe:close().

Needs -DLUAJIT_ENABLE_LUA52COMPAT.

src/lauxlib.h

@@ -76,6 +76,8 @@ LUALIB_API const char *(luaL_findtable) (lua_State *L, int idx,
                                          const char *fname, int szhint);
 
 /* From Lua 5.2. */
+LUALIB_API int luaL_fileresult(lua_State *L, int stat, const char *fname);
+LUALIB_API int luaL_execresult(lua_State *L, int stat);
 LUALIB_API int (luaL_loadfilex) (lua_State *L, const char *filename,
 				 const char *mode);
 LUALIB_API int (luaL_loadbufferx) (lua_State *L, const char *buff, size_t sz,